Bird feeder



FIG. 1 is a perspective drawing showing front, top and right side viewsof my new design for a bird feeder;

FIG. 2 is a left side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom thereof.

The ornamental design for a bird feeder, as shown and described.